US4565406A - Lumbar support device - Google Patents
Lumbar support device Download PDFInfo
- Publication number
- US4565406A US4565406A US06/715,086 US71508685A US4565406A US 4565406 A US4565406 A US 4565406A US 71508685 A US71508685 A US 71508685A US 4565406 A US4565406 A US 4565406A
- Authority
- US
- United States
- Prior art keywords
- cam portion
- elastic member
- lumbar support
- cam
- smaller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 7
- 230000003247 decreasing effect Effects 0.000 description 2
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/40—Support for the head or the back for the back
- A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
- A47C7/462—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means
Definitions
- the present invention relates to a lumbar support device for a vehicle seat and, more particularly, to such lumbar support device in which a cam is rotated to move one end of an elastic member extended across the right and left sides of a back frame of the seat in the longitudinal direction of the elastic member and thus to vary the curvature of the elastic member in its longitudinal direction so that the hardness of the lumbar support section of the vehicle seat can be adjusted.
- FIG. 1 A conventional lumbar support device of this type is illustrated in FIG. 1.
- a plate cam (1) is rotated via a shaft of rotation (4) by turning a handle (3) projected from the side of a seat back, and such rotation of the plate cam (1) causes an elastic member (2) of a wire to be moved in its longitudinal direction to vary the curvature of the elastic member (2) so as to adjust the hardness of the lumbar support section of the seat back.
- reference numeral (5) designates a slide piece which fixes one end of the elastic member (2) and is engaged with the plate cam (1)
- (6) represents a seat frame of the seat back.
- the present invention aims at eliminating the drawbacks found in the above-mentioned conventional lumbar support device.
- a cam comprises a small cam portion with which one end of an elastic member is engageable, and a large cam portion which is engaged with the small cam portion integrally and coaxially, and in the side surface of the large cam portion facing the small cam portion, there is provided a guide portion which is formed in a concavo-convex curved surface with respect to the direction of the elastic member. Therefore, since the one end of the elastic member is engaged with the small cam portion as well as the the guide portion of the large cam portion and loads applied to the cam can be dispersed in its radial and axial directions, the handle operation load in the invention can be reduced over the above-mentioned prior art device.
- the cam comprises a small cam portion which is an eccentric cam and a large cam portion having a guide section formed in a concavo-convex curved surface in its side surface, and thus the elastic member can be pushed out in its longitudinal direction by double displacements, that is, the displacement of the small cam portion and the displacement of the concavo-convex curved guide section in the large cam portion. Therefore, slight rotation of the handle can vary the longitudinal curvature of the elastic membber so as to adjust the hardness of the lumbar support portion of the seat.
- FIG. 1 is a perspective view of a conventional lumbar support device
- FIG. 3 is a front view of the above device
- FIG. 4 is a section view taken along line X--X in FIG. 3;
- FIGS. 5 and 6 are respectively side views of the invention, illustrating the operation of a cam employed in the invention.
- FIG. 2 illustrates a lumbar support device according to the invention and, in the drawings, like reference characters designate like parts throughout.
- a cam (a) comprising a smaller cam portion (10) and a larger cam portion (11) integrally engaged with each other.
- a slide piece (5) mounted to one end of an elastic member (2) is engaged with the side of the smaller cam portion (10) facing the larger cam portion (11) by means of the elasticity of the elastic member (2).
- the slide piece (5) and the shaft of rotation (4) are mounted to a bracket (7) fixed to a seat frame (6).
- the elastic member (2) then takes a curved form but similar to a straight line, so that the support pressure in the lumbar support section of the seat back is decreased.
- the support pressure of the lumbar support portion of the seat back can be adjusted by varying the curvature of the elastic member (2).
- the smaller cam portion (10) and the larger cam portion (11) forming the cam (a) are respectively formed of two small and large plate cams with the smaller cam portion (10) being disposed at the side of the elastic member (2); the thickness (10a) of the smaller cam portion (10) is not regular due to the shape of the larger cam portion (11).
- a guide section (11a) so formed that it has a concavo-convex curved surface with respect to the direction of the elastic member (2).
- the slide piece (5) of the above-mentioned elastic member (2) is slidably mounted to guide pieces (71),(71) of a bracket (7) such that the slide piece (5) can be engaged with the contact surface of the cam (a) at an angle of approx. 45 deg.
- the larger cam portion (11) is formed in it rotational direction with a great number of recessed engagement grooves (13),(13),--, with which a brake shoe made of a plate spring can be engaged. Namely, the brake shoe (12), due to its elasticity, presses against the peripheral surface of the larger cam portion (11) to control the rotation of the cam (a).
- FIGS. 3 and 4 respectively illustrate a state of the seat back in which the support pressure of its lumbar support portion is smaller (that is, a state thereof in which its lumbar support portion is softer), and in this state the slide piece (5) mounted to one end of the elastic member (2) is in abutment against the guide section (11a) of the larger cam portion (11) in the smaller cam portion (10) due to the elasticity of the elastic member (2). Then, if a handle (3) is turned, then the cam (a) is rotated.
- the slide piece (5) is moved along the guide section (11a) of the larger cam portion (11) and thus is pushed out to cause the elastic member (2) to be curved, so that the support pressure of the lumbar support portion of the seat back is increased, (FIGS. 5 and 6).
- the amounts of displacement of the above-mentioned slide piece (5) are the sum of the displacement of the smaller cam portion (10) and the concavo-convex depth in the guide section (11a) of the larger cam portion (11).
Abstract
A lumbar support device is disclosed in which a cam is rotated to longitudinally move an elastic member extending across the right and left sides of a back frame and thus vary the curvature of the elastic member in its longitudinal direction so as to be able to adjust the hardness of the lumbar support portion of a seat back forming part of a vehicle seat. The cam comprises a smaller cam portion mounted at the side of the elastic member to a shaft and a larger cam portion engaged coaxially and integrally with the smaller cam portion and provided at its side facing the smaller cam portion with a guide section having a concavo-convex curved surface with respect to the elastic member. The elastic member is pushed out in accordance with both displacements of the smaller cam portion and the guide section in the larger cam portion so that the curvature of the elastic member is varied accordingly.
Description
1. Field of the Invention
The present invention relates to a lumbar support device for a vehicle seat and, more particularly, to such lumbar support device in which a cam is rotated to move one end of an elastic member extended across the right and left sides of a back frame of the seat in the longitudinal direction of the elastic member and thus to vary the curvature of the elastic member in its longitudinal direction so that the hardness of the lumbar support section of the vehicle seat can be adjusted.
2. Description of the Prior Art
A conventional lumbar support device of this type is illustrated in FIG. 1. In this conventional device, a plate cam (1) is rotated via a shaft of rotation (4) by turning a handle (3) projected from the side of a seat back, and such rotation of the plate cam (1) causes an elastic member (2) of a wire to be moved in its longitudinal direction to vary the curvature of the elastic member (2) so as to adjust the hardness of the lumbar support section of the seat back. In FIG. 1, reference numeral (5) designates a slide piece which fixes one end of the elastic member (2) and is engaged with the plate cam (1), and (6) represents a seat frame of the seat back.
In such conventional lumbar support device, however, since the loads of the elastic member are carried by one surface of the plate cam, heavy loads are necessary to operate the cam. In other words, such conventional device is disadvantages in that the adjustment of the hardness of the seat back lumbar support section can not be made smoothly.
The present invention aims at eliminating the drawbacks found in the above-mentioned conventional lumbar support device.
Accordingly, it is a primary object of the invention to provide an improved lumbar support device which eliminates the centralized load of an elastic member on a plate cam to reduce the load necessary to operate a handle.
In order to accomplish this object, according to one aspect of the invention, a cam comprises a small cam portion with which one end of an elastic member is engageable, and a large cam portion which is engaged with the small cam portion integrally and coaxially, and in the side surface of the large cam portion facing the small cam portion, there is provided a guide portion which is formed in a concavo-convex curved surface with respect to the direction of the elastic member. Therefore, since the one end of the elastic member is engaged with the small cam portion as well as the the guide portion of the large cam portion and loads applied to the cam can be dispersed in its radial and axial directions, the handle operation load in the invention can be reduced over the above-mentioned prior art device.
It is another object of the invention to provide an improved lumbar support device which is able to vary the longitudinal curvature of the above-mentioned elastic member by operating or turning the handle slightly, that is, a device which can adjust the hardness of the lumbar support portion of a vehicle seat by slightly rotating the handle.
In attaining this object, according to an another aspect of the invention, the cam comprises a small cam portion which is an eccentric cam and a large cam portion having a guide section formed in a concavo-convex curved surface in its side surface, and thus the elastic member can be pushed out in its longitudinal direction by double displacements, that is, the displacement of the small cam portion and the displacement of the concavo-convex curved guide section in the large cam portion. Therefore, slight rotation of the handle can vary the longitudinal curvature of the elastic membber so as to adjust the hardness of the lumbar support portion of the seat.
Other and further objects, features and advantages of the invention will appear more fully from the following description.
FIG. 1 is a perspective view of a conventional lumbar support device;
FIG. 2 is a perspective view of a lumbar support device constructed in accordance with the invention;
FIG. 3 is a front view of the above device;
FIG. 4 is a section view taken along line X--X in FIG. 3; and,
FIGS. 5 and 6 are respectively side views of the invention, illustrating the operation of a cam employed in the invention.
FIG. 2 illustrates a lumbar support device according to the invention and, in the drawings, like reference characters designate like parts throughout. To a shaft of rotation (4) is mounted a cam (a) comprising a smaller cam portion (10) and a larger cam portion (11) integrally engaged with each other. A slide piece (5) mounted to one end of an elastic member (2) is engaged with the side of the smaller cam portion (10) facing the larger cam portion (11) by means of the elasticity of the elastic member (2). The slide piece (5) and the shaft of rotation (4) are mounted to a bracket (7) fixed to a seat frame (6).
The elastic member (2) is curvedly provided extending between the slide piece (5) and a mount piece (8) mounted at the opposite side of the seat frame (6) so as to be expandable forwardly of a seat back, and it is also arranged such that its curvature can be altered with the displacements of the slide piece (5) caused by rotat-ion of the cam (a). That is, if the slide piece (5) is moved in the direction of the mount piece (8), then the elastic member (2) is curved in a general arc, as shown by a solid line in FIG. 2, to increase the support pressure in the lumbar support portion of the seat back. If the slide piece (5) is displaced in the opposite direction, as shown by a two-dot chained line in FIG. 1, the elastic member (2) then takes a curved form but similar to a straight line, so that the support pressure in the lumbar support section of the seat back is decreased. In brief, in the invention, the support pressure of the lumbar support portion of the seat back can be adjusted by varying the curvature of the elastic member (2).
The smaller cam portion (10) and the larger cam portion (11) forming the cam (a) are respectively formed of two small and large plate cams with the smaller cam portion (10) being disposed at the side of the elastic member (2); the thickness (10a) of the smaller cam portion (10) is not regular due to the shape of the larger cam portion (11). In particular, in the side of the larger cam portion (11) facing the smaller cam portion (10) there is provided a guide section (11a) so formed that it has a concavo-convex curved surface with respect to the direction of the elastic member (2). Thanks to this guide section (11a), the thickness (10a) of the smaller cam portion (10) can be changed in accordance with distances (1),(1') between the rotation shaft (4) of the smaller cam portion (10) and the contact points of the smaller cam portion (10) with the slide piece (5), as shown in FIG. 4. In other words, the thickness (w) of the furthest portion (1) from the rotation shaft (4) of the smaller cam portion (10) is narrower, and the thickness (w') of the nearer portion is wider. It is noted that the larger cam portion (11) is a concentric circle with respect to the shaft of rotation (4).
The slide piece (5) of the above-mentioned elastic member (2) is slidably mounted to guide pieces (71),(71) of a bracket (7) such that the slide piece (5) can be engaged with the contact surface of the cam (a) at an angle of approx. 45 deg.
The larger cam portion (11) is formed in it rotational direction with a great number of recessed engagement grooves (13),(13),--, with which a brake shoe made of a plate spring can be engaged. Namely, the brake shoe (12), due to its elasticity, presses against the peripheral surface of the larger cam portion (11) to control the rotation of the cam (a).
FIGS. 3 and 4 respectively illustrate a state of the seat back in which the support pressure of its lumbar support portion is smaller (that is, a state thereof in which its lumbar support portion is softer), and in this state the slide piece (5) mounted to one end of the elastic member (2) is in abutment against the guide section (11a) of the larger cam portion (11) in the smaller cam portion (10) due to the elasticity of the elastic member (2). Then, if a handle (3) is turned, then the cam (a) is rotated. As a result of this, the slide piece (5) is moved along the guide section (11a) of the larger cam portion (11) and thus is pushed out to cause the elastic member (2) to be curved, so that the support pressure of the lumbar support portion of the seat back is increased, (FIGS. 5 and 6). The amounts of displacement of the above-mentioned slide piece (5) are the sum of the displacement of the smaller cam portion (10) and the concavo-convex depth in the guide section (11a) of the larger cam portion (11).
As described above, according to the invention, the cam is composed of the smaller and larger cam portions and in the side surface of the larger cam portion facing the smaller cam portion there is provided the guide section having the concavo-convex curved surface with respect to the direction of rotation of the cam, so that the load applied to the cam can be dispersed in the axial direction of the rotational shaft as well as in a direction orthogonal thereto. Therefore, the load necessary for operation of the handle can be reduced and also the force to restrict the rotation of the cam can be decreased, which results in the use of a simpler brake device and permits adjustments of the support pressure of the lumbar support portion of the seat back at desired positions and in a continuous manner. Also, since the invention is simple in structure, it is substantially free from failure and can be supplied at a low cost.
Claims (5)
1. A lumbar support device for adjusting the hardness of the lumbar support portion of a seat back by rotating a cam to move one end of an elastic member extending the right and left sides of a back frame and thus varying the curvature of said elastic member, wherein said cam comprises a smaller cam portion with which said one end of said elastic member can be engaged and a larger cam portion engaged with said smaller cam portion and mounted to the same shaft therewith, and, in the side surface of said larger cam portion facing said smaller cam portion, there is provided a guide section having a concavo-convex curved surface with respect to the direction of said elastic member.
2. The lumbar support device as set forth in claim 1, wherein a slide piece is mounted to said one end of said elastic member and said slide piece is engaged with said smaller cam portion at an angle of approximately 45 degrees.
3. The lumbar support device as set forth in claim 1, wherein said larger cam portion is formed in its outer peripheral surface with a large number of engagement grooves and a brake shoe made of a plate spring can be engaged with one of said engagement grooves to restrict the rotation of said cam.
4. The lumbar support device as set forth in claim 1, wherein said slide piece mounted to said one end of said elastic member is in engagement with both said smaller cam portion and said guide section of said larger cam portion by means of the elasticity of said elastic member.
5. The lumbar support device as set forth in claim 1, wherein the portion of said guide section to be projected furthest in the direction of said elastic member is located at the portion of the outer peripheral surface of said smaller cam portion that is furthest from the rotational shaft of said smaller cam portion.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59-63060 | 1984-03-29 | ||
JP59063060A JPS60207614A (en) | 1984-03-29 | 1984-03-29 | Lamber support apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US4565406A true US4565406A (en) | 1986-01-21 |
Family
ID=13218418
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/715,086 Expired - Fee Related US4565406A (en) | 1984-03-29 | 1985-03-22 | Lumbar support device |
Country Status (4)
Country | Link |
---|---|
US (1) | US4565406A (en) |
JP (1) | JPS60207614A (en) |
AU (1) | AU575427B2 (en) |
IT (1) | IT1183517B (en) |
Cited By (50)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2596334A1 (en) * | 1986-03-25 | 1987-10-02 | Renault | Seat backrest with a device for adjusting the lumbar support |
US4715653A (en) * | 1985-09-19 | 1987-12-29 | Aisin Seiki Kabushiki Kaisha | Lumbar support apparatus |
US4886316A (en) * | 1987-06-30 | 1989-12-12 | Tachi-S Co., Ltd. | Lumbar support device |
US5044693A (en) * | 1989-10-31 | 1991-09-03 | Tachi-S Co., Ltd. | Seat back structure of an automotive seat |
WO1992017096A1 (en) * | 1991-03-26 | 1992-10-15 | Henderson's Industries Pty. Ltd. | Lumbar support adjustment device |
US5224757A (en) * | 1988-03-31 | 1993-07-06 | Henderson's Federal Spring Works Pty. Ltd. | Lumbar support waist band and mechanism therefor |
US5286087A (en) * | 1992-11-09 | 1994-02-15 | Hoover Universal, Inc. | Seat assembly with lumbar support mechanism |
US5609394A (en) * | 1996-02-23 | 1997-03-11 | Ligon Brothers Manufacturing Company | Four-way lumbar support |
GB2316604A (en) * | 1996-08-23 | 1998-03-04 | Youngflex Ag | Seat suspension arrangement for lumbar support adjustment |
US5769490A (en) * | 1993-12-24 | 1998-06-23 | Henderson's Industries Pty. Ltd. | Adjustable lumbar support |
US5860700A (en) * | 1991-03-26 | 1999-01-19 | Henderson's Industries Pty. Ltd. | Lumbar support adjustment device |
US6079785A (en) * | 1999-01-12 | 2000-06-27 | Steelcase Development Inc. | Chair having adjustable lumbar support |
US6254186B1 (en) | 1996-09-05 | 2001-07-03 | Henderson's Industries Pty Ltd | Adjustable lumbar support |
US6394546B1 (en) | 1997-10-24 | 2002-05-28 | Steelcase Development Corporation | Lumbar device |
US6402246B1 (en) | 2001-04-11 | 2002-06-11 | L&P Property Management | Simplified strap lumbar support device |
US6557938B1 (en) | 2000-09-18 | 2003-05-06 | L & P Property Management Company | Adjustable lumbar device |
US6588842B2 (en) * | 1992-06-15 | 2003-07-08 | Herman Miller, Inc. | Backrest |
US6619739B2 (en) | 2001-03-01 | 2003-09-16 | L & P Property Management Company | Universal ergonomic support with self-contained actuator |
US6623076B2 (en) | 1993-06-17 | 2003-09-23 | Schukra-Gerätebau AG | Adjustment apparatus for a resiliently flexible support element of a back rest |
US6644740B2 (en) * | 2000-06-28 | 2003-11-11 | Lear Corporation | Vehicle seat lumbar support system |
US6652028B2 (en) | 2001-11-02 | 2003-11-25 | L & P Property Management | Apparatus and method for lumbar support with variable apex |
US6652029B2 (en) | 2001-12-20 | 2003-11-25 | L & P Property Management Company | Unitized back plate and lumbar support |
US6666511B2 (en) | 1989-08-04 | 2003-12-23 | Schukra Geratebau Ag | Arching mechanism and method of use |
US6676214B2 (en) | 2001-11-16 | 2004-01-13 | L & P Property Management Company | Method and apparatus for lumbar support with integrated actuator housing |
US6758522B2 (en) | 2001-03-29 | 2004-07-06 | L&P Property Management Company | Apparatus and method for varying coefficients of friction in a variable apex back support |
US20040140705A1 (en) * | 2003-01-22 | 2004-07-22 | L & P Property Management Company | Automatically actuating ergonomic support system for a fold down seat |
US20040140700A1 (en) * | 2003-01-22 | 2004-07-22 | Mcmillen Robert J. | Fold down seat lumbar support apparatus and method |
US6779844B2 (en) | 2001-12-14 | 2004-08-24 | L&P Propety Maqnagement Company | Arching lumbar support with weight distribution surface |
US20040245840A1 (en) * | 2002-09-12 | 2004-12-09 | Tubergen Renard G. | Seating with comfort surface |
US6908153B2 (en) | 2002-12-02 | 2005-06-21 | L&P Property Management Company | Power lumbar support cable apparatus and method |
US6908152B2 (en) | 2001-12-14 | 2005-06-21 | L & P Property Management Company | Push lumbar support with flexible pressure surface |
US6938955B2 (en) | 2001-10-11 | 2005-09-06 | L&P Property Management Co. | Power lumbar mechanism |
US7052087B2 (en) | 2002-12-09 | 2006-05-30 | L&P Property Management Company | Method and apparatus for a scissors ergonomic support |
US7140680B2 (en) | 2003-01-22 | 2006-11-28 | L&P Property Management Company | Fold down seat lumbar support apparatus and method |
US20060267382A1 (en) * | 2005-05-18 | 2006-11-30 | Schukra Of North America | Arm rest return |
US20070228789A1 (en) * | 2006-03-30 | 2007-10-04 | Schukra Of North America | Combination Lumbar-Bolster System |
US20070236039A1 (en) * | 2004-02-06 | 2007-10-11 | L8 P Property Management Company | Drive Mechanism |
US20070296256A1 (en) * | 2004-07-30 | 2007-12-27 | Renato Colja | Modular Contour Support Apparatus |
WO2008023119A2 (en) * | 2006-08-24 | 2008-02-28 | Services France Agence (Sfa) | Seat with adaptable back allowing a person seated in this seat to adjust said back at its dorsal supports. |
US20080265649A1 (en) * | 2007-04-24 | 2008-10-30 | Schukra Of North America, Ltd. | Lumbar and Bolster Support for Second Row Seat |
US20080284232A1 (en) * | 2005-01-12 | 2008-11-20 | L&P Swiss Holding Company | Coupling Unit and Adjusting Mechanism Using the Coupling Unit |
US20090096263A1 (en) * | 2005-01-12 | 2009-04-16 | L&P Swiss Holding Company | Lumbar Support Assembly and Corresponding Seat Structure |
US7614696B2 (en) | 2006-12-11 | 2009-11-10 | Schukra Of North America | Lumbar system for climate seating |
DE4395046B4 (en) * | 1992-10-12 | 2010-01-21 | Teleflex Capro Pty. Ltd. | Adjustable lumbar support and seat assembly with such lumbar support |
US20110121624A1 (en) * | 2009-11-23 | 2011-05-26 | Faurecia Automotive Seating, Inc. | Controllable comfort shell for vehicle seat |
US7997650B2 (en) | 2008-02-22 | 2011-08-16 | Schukra Of North America | Constant pressure retreating lumbar system |
US20160207428A1 (en) * | 2015-01-16 | 2016-07-21 | Hyundai Motor Company | Vehicle seat having improved performance of reducing whiplash injury |
US9604560B1 (en) | 2015-11-13 | 2017-03-28 | Kongsberg Automotive, Inc. | Assembly for adjusting a lumbar region of a seat |
US10427569B2 (en) | 2015-01-26 | 2019-10-01 | Kongsberg Automotive, Inc. | Adjustment mechanism for a seat |
US20230157452A1 (en) * | 2020-04-28 | 2023-05-25 | H2 Norway As | Seating device with a reclining function |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU585714B2 (en) * | 1986-05-16 | 1989-06-22 | Sturdy Components Pty. Limited | Improved chair incorporating lumbar support |
KR930010035B1 (en) * | 1988-03-31 | 1993-10-14 | 헨더슨즈 훼더럴 스프링 웍스 피티와이 리미티드 | Lunbar support waist band and mechanism therefor |
AU636293B2 (en) * | 1988-03-31 | 1993-04-29 | Henderson's Federal Spring Works Pty. Ltd. | Lumbar support waist band and mechanism therefor |
JP5105504B2 (en) * | 2006-11-15 | 2012-12-26 | コクヨ株式会社 | Chair |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3241879A (en) * | 1963-06-10 | 1966-03-22 | Ford Motor Co | Spring seat structure |
US4019777A (en) * | 1975-02-06 | 1977-04-26 | Aisin Seiki Kabushiki Kaisha | Lumbar support regulating apparatus |
US4162807A (en) * | 1976-11-01 | 1979-07-31 | Aisin Seiki Kabushiki Kaisha | Lumbar support regulating apparatus |
US4296965A (en) * | 1978-07-31 | 1981-10-27 | Nissan Motor Company, Limited | Seat with adjustable lumbar supporter |
US4449751A (en) * | 1981-05-26 | 1984-05-22 | Lear Siegler, Inc. | Seat backrest having an adjustable lumbar support |
-
1984
- 1984-03-29 JP JP59063060A patent/JPS60207614A/en active Pending
-
1985
- 1985-03-22 US US06/715,086 patent/US4565406A/en not_active Expired - Fee Related
- 1985-03-29 IT IT20140/85A patent/IT1183517B/en active
- 1985-09-05 AU AU47090/85A patent/AU575427B2/en not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3241879A (en) * | 1963-06-10 | 1966-03-22 | Ford Motor Co | Spring seat structure |
US4019777A (en) * | 1975-02-06 | 1977-04-26 | Aisin Seiki Kabushiki Kaisha | Lumbar support regulating apparatus |
US4162807A (en) * | 1976-11-01 | 1979-07-31 | Aisin Seiki Kabushiki Kaisha | Lumbar support regulating apparatus |
US4296965A (en) * | 1978-07-31 | 1981-10-27 | Nissan Motor Company, Limited | Seat with adjustable lumbar supporter |
US4449751A (en) * | 1981-05-26 | 1984-05-22 | Lear Siegler, Inc. | Seat backrest having an adjustable lumbar support |
Cited By (83)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4715653A (en) * | 1985-09-19 | 1987-12-29 | Aisin Seiki Kabushiki Kaisha | Lumbar support apparatus |
FR2596334A1 (en) * | 1986-03-25 | 1987-10-02 | Renault | Seat backrest with a device for adjusting the lumbar support |
US4886316A (en) * | 1987-06-30 | 1989-12-12 | Tachi-S Co., Ltd. | Lumbar support device |
US5224757A (en) * | 1988-03-31 | 1993-07-06 | Henderson's Federal Spring Works Pty. Ltd. | Lumbar support waist band and mechanism therefor |
US6666511B2 (en) | 1989-08-04 | 2003-12-23 | Schukra Geratebau Ag | Arching mechanism and method of use |
US5044693A (en) * | 1989-10-31 | 1991-09-03 | Tachi-S Co., Ltd. | Seat back structure of an automotive seat |
US5860700A (en) * | 1991-03-26 | 1999-01-19 | Henderson's Industries Pty. Ltd. | Lumbar support adjustment device |
AU655256B2 (en) * | 1991-03-26 | 1994-12-08 | Henderson's Industries Pty Ltd | Lumbar support adjustment device |
WO1992017096A1 (en) * | 1991-03-26 | 1992-10-15 | Henderson's Industries Pty. Ltd. | Lumbar support adjustment device |
US6726286B2 (en) | 1992-06-15 | 2004-04-27 | Herman Miller, Inc. | Seating structure having a fabric with a weave pattern |
US6722741B2 (en) | 1992-06-15 | 2004-04-20 | Herman Miller, Inc. | Seating structure having a backrest with a bowed section |
US6702390B2 (en) | 1992-06-15 | 2004-03-09 | Herman Miller, Inc. | Support assembly for a seating structure |
US20040155503A1 (en) * | 1992-06-15 | 2004-08-12 | Herman Miller, Inc. | Chair with a linkage assembly |
US6588842B2 (en) * | 1992-06-15 | 2003-07-08 | Herman Miller, Inc. | Backrest |
US6733080B2 (en) | 1992-06-15 | 2004-05-11 | Herman Miller, Inc. | Seating structure having a backrest with a flexible membrane and a moveable armrest |
EP1491117B1 (en) * | 1992-06-15 | 2008-01-16 | Herman Miller, Inc. | Backrest for a chair |
DE4395046B4 (en) * | 1992-10-12 | 2010-01-21 | Teleflex Capro Pty. Ltd. | Adjustable lumbar support and seat assembly with such lumbar support |
US5286087A (en) * | 1992-11-09 | 1994-02-15 | Hoover Universal, Inc. | Seat assembly with lumbar support mechanism |
US6623076B2 (en) | 1993-06-17 | 2003-09-23 | Schukra-Gerätebau AG | Adjustment apparatus for a resiliently flexible support element of a back rest |
US6883867B2 (en) | 1993-06-17 | 2005-04-26 | Schukra Geratebau Ag | Device for adjusting a flexible support element of a backrest |
US20040075320A1 (en) * | 1993-06-17 | 2004-04-22 | Schukra Geratebau Ag | Device for adjusting a flexible support element of a backrest |
US5769490A (en) * | 1993-12-24 | 1998-06-23 | Henderson's Industries Pty. Ltd. | Adjustable lumbar support |
US5609394A (en) * | 1996-02-23 | 1997-03-11 | Ligon Brothers Manufacturing Company | Four-way lumbar support |
US6152531A (en) * | 1996-08-23 | 2000-11-28 | Youngflex Ag | Seat suspension arrangement and adjustment mechanism therefore |
GB2316604B (en) * | 1996-08-23 | 1998-10-14 | Youngflex Ag | Improved seat suspension arrangement and adjustment mechanism therefor |
GB2316604A (en) * | 1996-08-23 | 1998-03-04 | Youngflex Ag | Seat suspension arrangement for lumbar support adjustment |
US6254186B1 (en) | 1996-09-05 | 2001-07-03 | Henderson's Industries Pty Ltd | Adjustable lumbar support |
US6394546B1 (en) | 1997-10-24 | 2002-05-28 | Steelcase Development Corporation | Lumbar device |
US6079785A (en) * | 1999-01-12 | 2000-06-27 | Steelcase Development Inc. | Chair having adjustable lumbar support |
US6644740B2 (en) * | 2000-06-28 | 2003-11-11 | Lear Corporation | Vehicle seat lumbar support system |
US6557938B1 (en) | 2000-09-18 | 2003-05-06 | L & P Property Management Company | Adjustable lumbar device |
US20050035637A1 (en) * | 2001-03-01 | 2005-02-17 | Mcmillen Robert James | Universal ergonomic support with self-contained actuator |
US6619739B2 (en) | 2001-03-01 | 2003-09-16 | L & P Property Management Company | Universal ergonomic support with self-contained actuator |
US6824214B2 (en) | 2001-03-01 | 2004-11-30 | L & P Property Management Company | Universal ergonomic support with self-contained actuator |
US7077476B2 (en) | 2001-03-01 | 2006-07-18 | L&P Property Management Company | Universal ergonomic support with self-contained actuator |
US6758522B2 (en) | 2001-03-29 | 2004-07-06 | L&P Property Management Company | Apparatus and method for varying coefficients of friction in a variable apex back support |
US6402246B1 (en) | 2001-04-11 | 2002-06-11 | L&P Property Management | Simplified strap lumbar support device |
US6938955B2 (en) | 2001-10-11 | 2005-09-06 | L&P Property Management Co. | Power lumbar mechanism |
US20040245824A1 (en) * | 2001-11-02 | 2004-12-09 | L & P Property Management Company | Apparatus and method for lumbar support with variable apex |
US6652028B2 (en) | 2001-11-02 | 2003-11-25 | L & P Property Management | Apparatus and method for lumbar support with variable apex |
US6676214B2 (en) | 2001-11-16 | 2004-01-13 | L & P Property Management Company | Method and apparatus for lumbar support with integrated actuator housing |
US6908152B2 (en) | 2001-12-14 | 2005-06-21 | L & P Property Management Company | Push lumbar support with flexible pressure surface |
US6779844B2 (en) | 2001-12-14 | 2004-08-24 | L&P Propety Maqnagement Company | Arching lumbar support with weight distribution surface |
US6652029B2 (en) | 2001-12-20 | 2003-11-25 | L & P Property Management Company | Unitized back plate and lumbar support |
US20040245840A1 (en) * | 2002-09-12 | 2004-12-09 | Tubergen Renard G. | Seating with comfort surface |
US7226130B2 (en) | 2002-09-12 | 2007-06-05 | Steelcase Development Corporation | Seating with comfort surface |
US20070228800A1 (en) * | 2002-09-12 | 2007-10-04 | Tubergen Renard G | Seating with comfort surface |
US7360835B2 (en) | 2002-09-12 | 2008-04-22 | Steelcase Inc. | Seating with comfort surface |
US6908153B2 (en) | 2002-12-02 | 2005-06-21 | L&P Property Management Company | Power lumbar support cable apparatus and method |
US7052087B2 (en) | 2002-12-09 | 2006-05-30 | L&P Property Management Company | Method and apparatus for a scissors ergonomic support |
US6905170B2 (en) | 2003-01-22 | 2005-06-14 | L & P Property Management Company | Fold down seat lumbar support apparatus and method |
US7137664B2 (en) | 2003-01-22 | 2006-11-21 | L&P Property Management Company | Automatically actuating ergonomic support system for a fold down seat |
US7140680B2 (en) | 2003-01-22 | 2006-11-28 | L&P Property Management Company | Fold down seat lumbar support apparatus and method |
US20040140700A1 (en) * | 2003-01-22 | 2004-07-22 | Mcmillen Robert J. | Fold down seat lumbar support apparatus and method |
US20040140705A1 (en) * | 2003-01-22 | 2004-07-22 | L & P Property Management Company | Automatically actuating ergonomic support system for a fold down seat |
US7775595B2 (en) | 2004-02-06 | 2010-08-17 | Schukra Of North America | Drive mechanism |
US20070236039A1 (en) * | 2004-02-06 | 2007-10-11 | L8 P Property Management Company | Drive Mechanism |
US20070296256A1 (en) * | 2004-07-30 | 2007-12-27 | Renato Colja | Modular Contour Support Apparatus |
US8382204B2 (en) | 2004-07-30 | 2013-02-26 | Schukra of North America Co. | Modular contour support apparatus |
US7984948B2 (en) | 2004-07-30 | 2011-07-26 | Schukra Of North America, Ltd. | Modular contour support apparatus |
US20080284232A1 (en) * | 2005-01-12 | 2008-11-20 | L&P Swiss Holding Company | Coupling Unit and Adjusting Mechanism Using the Coupling Unit |
US8544953B2 (en) | 2005-01-12 | 2013-10-01 | L&P Swiss Holding Ag | Lumbar support assembly and corresponding seat structure |
US20090096263A1 (en) * | 2005-01-12 | 2009-04-16 | L&P Swiss Holding Company | Lumbar Support Assembly and Corresponding Seat Structure |
US7841661B2 (en) | 2005-01-12 | 2010-11-30 | L&P Swiss Holding Company | Lumbar support assembly and corresponding seat structure |
US7690726B2 (en) | 2005-01-12 | 2010-04-06 | L&P Swiss Holding Company | Coupling unit and adjusting mechanism using the coupling unit |
US20060267382A1 (en) * | 2005-05-18 | 2006-11-30 | Schukra Of North America | Arm rest return |
US7490899B2 (en) | 2006-03-30 | 2009-02-17 | Schukra Of North America | Combination lumbar-bolster system |
US20070228789A1 (en) * | 2006-03-30 | 2007-10-04 | Schukra Of North America | Combination Lumbar-Bolster System |
WO2008023119A3 (en) * | 2006-08-24 | 2008-11-27 | Services France Agence Sfa | Seat with adaptable back allowing a person seated in this seat to adjust said back at its dorsal supports. |
FR2905056A1 (en) * | 2006-08-24 | 2008-02-29 | Services France Agence Sfa Soc | ADAPTABLE BACKREST FOR A PERSON SITUATED IN THAT SEAT, TO ADJUST THIS DOSSIER AT THE LEVEL OF ITS BACK SUPPORT |
WO2008023119A2 (en) * | 2006-08-24 | 2008-02-28 | Services France Agence (Sfa) | Seat with adaptable back allowing a person seated in this seat to adjust said back at its dorsal supports. |
US7614696B2 (en) | 2006-12-11 | 2009-11-10 | Schukra Of North America | Lumbar system for climate seating |
US7984949B2 (en) | 2007-04-24 | 2011-07-26 | Schukra Of North America | Lumbar and bolster support for second row seat |
US20080265649A1 (en) * | 2007-04-24 | 2008-10-30 | Schukra Of North America, Ltd. | Lumbar and Bolster Support for Second Row Seat |
US7997650B2 (en) | 2008-02-22 | 2011-08-16 | Schukra Of North America | Constant pressure retreating lumbar system |
US20110121624A1 (en) * | 2009-11-23 | 2011-05-26 | Faurecia Automotive Seating, Inc. | Controllable comfort shell for vehicle seat |
US8857908B2 (en) * | 2009-11-23 | 2014-10-14 | Faurecia Automotive Seating, Llc | Controllable comfort shell for vehicle seat |
US9358911B2 (en) | 2009-11-23 | 2016-06-07 | Faurecia Automotive Seating, Llc | Controllable comfort shell for vehicle seat |
US20160207428A1 (en) * | 2015-01-16 | 2016-07-21 | Hyundai Motor Company | Vehicle seat having improved performance of reducing whiplash injury |
US9845028B2 (en) * | 2015-01-16 | 2017-12-19 | Hyundai Motor Company | Vehicle seat having improved performance of reducing whiplash injury |
US10427569B2 (en) | 2015-01-26 | 2019-10-01 | Kongsberg Automotive, Inc. | Adjustment mechanism for a seat |
US9604560B1 (en) | 2015-11-13 | 2017-03-28 | Kongsberg Automotive, Inc. | Assembly for adjusting a lumbar region of a seat |
US20230157452A1 (en) * | 2020-04-28 | 2023-05-25 | H2 Norway As | Seating device with a reclining function |
Also Published As
Publication number | Publication date |
---|---|
IT8520140A0 (en) | 1985-03-29 |
AU4709085A (en) | 1987-03-12 |
JPS60207614A (en) | 1985-10-19 |
IT1183517B (en) | 1987-10-22 |
AU575427B2 (en) | 1988-07-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4565406A (en) | Lumbar support device | |
US4564235A (en) | Lumbar support device | |
US5685606A (en) | Adjustable lumbar support | |
US4019777A (en) | Lumbar support regulating apparatus | |
US7243994B2 (en) | Continuously operable seat-reclining device for vehicles | |
US6543807B2 (en) | Steering position adjustment device | |
US5437351A (en) | Friction disk brake mechanism for electric motor | |
JP4353722B2 (en) | Disc brake actuator | |
US4896918A (en) | Lumbar support regulating apparatus | |
US5718149A (en) | Yoke apparatus for rack and pinion | |
JP2654349B2 (en) | Sun visor used for vehicles | |
US6952980B2 (en) | Pedal device wherein non-operated position of operating portion is adjustable | |
WO1996029229A1 (en) | Yoke apparatus for rack and pinion | |
US4581952A (en) | Steering apparatus of rack and pinion type | |
JPH08261261A (en) | Disc brake device | |
JPH052128Y2 (en) | ||
JPH059862Y2 (en) | ||
CN115140147A (en) | Steering wheel | |
EP3168514B1 (en) | Hydraulic overpressure valve and hydraulic machine | |
JP3624301B2 (en) | Rack and pinion type steering device | |
JPH1034883A (en) | Method for adjusting outside diameter of sheet feed cylinder of rotary press and sheet feed cylinder | |
JPH10179312A (en) | Device for elastically adjusting seat or back of chair | |
JPH0540763Y2 (en) | ||
JP3495431B2 (en) | Rack support equipment | |
JP2886287B2 (en) | Outboard motor steering load adjustment device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: TACHIKAWA SPRING CO., LTD., 2-12, MATSUBARACHO 3-C Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SUZUKI, HIROSHI;REEL/FRAME:004452/0142 Effective date: 19850830 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 19940123 |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |